Quantum state preparation for coupled period tripling oscillators
Quantum state preparation for coupled period tripling oscillators
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DOI：
10.1103/physrevresearch.1.023023
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发表时间：
2019-04
影响因子：
4.2
通讯作者：
N. Lörch;Yaxing Zhang;C. Bruder;M. Dykman
中科院分区：
文献类型：
--
作者：
N. Lörch;Yaxing Zhang;C. Bruder;M. Dykman
我们研究了耦合振子在三倍于本征频率的驱动下表现出三倍周期的量子跃迁。在各个振荡器的离散振荡相位之间形成关联。向有序态的演化伴随着看似等价的组态之间对称性的瞬时破坏。我们将其归因于表征周期三倍的非平凡几何相位。我们还证明了在经典稳定的零幅值态下，单个阻尼态量子振子的Wigner分布可以表现出极小值。
We investigate the quantum transition to a correlated state of coupled oscillators in the regime where they display period tripling in response to a drive at triple the eigenfrequency. Correlations are formed between the discrete oscillation phases of individual oscillators. The evolution toward the ordered state is accompanied by the transient breaking of the symmetry between seemingly equivalent configurations. We attribute this to the nontrivial geometric phase that characterizes period tripling. We also show that the Wigner distribution of a single damped quantum oscillator can display a minimum at the classically stable zero-amplitude state.